Resonant emission from the B870 exciton state and electron-phonon coupling in the LH2 antenna chromoprotein

被引：53

作者：

Rätsep, M ^{[1
]}

Freiberg, A ^{[1
]}

机构：

[1] Univ Tartu, Inst Phys, EE-51014 Tartu, Estonia

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 377卷 / 3-4期

关键词：

D O I：

10.1016/S0009-2614(03)01193-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Fluorescence of the peripheral LH2 antenna complex from the photosynthetic bacterium Rhodobacter sphaeroides has been studied at 5 K upon selective excitation into the B870 exciton absorption band. Heterogeneous nature of the LH2 emission band has been confirmed by a double spectral selection technique simultaneously utilizing hole burning and fluorescence line narrowing spectroscopy. The phonon structure of the spectra related to the B870 band has been analyzed resulting in a genuine single-exciton state absorption/emission profile. The total electron-phonon coupling strength S = 0.8 +/- 0.2, larger than previously assumed, has been determined. (C) 2003 Published by Elsevier B.V.

引用

页码：371 / 376

页数：6